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J & K CET Medical J & K - CET Medical Solved Paper-2008

  • question_answer
    A sphere of radius R is gently dropped into liquid of viscosity \[\eta \] in a vertical uniform tube. It attains a terminal velocity v. Another sphere of radius 2 R when dropped into the same liquid, will attain its terminal velocity

    A)  v                                            

    B)  2v

    C)  4v                                         

    D)  9v

    Correct Answer: C

    Solution :

                     Terminal velocity \[v\propto {{r}^{2}}\] \[\therefore \]  \[\frac{v}{v}=\frac{{{(2R)}^{2}}}{{{(R)}^{2}}}\] or            \[v=4v\]


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